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The tissue of the seminal vesicles is full of glands, spaced irregularly. [8] As well as glands, the seminal vesicles contain smooth muscle and connective tissue. [8] This fibrous and muscular tissue surrounds the glands, helping to expel their contents. [3] The outer surface of the glands is covered in peritoneum. [3]
The seminal vesicles produce a yellowish viscous fluid rich in fructose and other substances that makes up about 70% of human semen. [5] The prostatic secretion, influenced by dihydrotestosterone, is a whitish (sometimes clear), thin fluid containing proteolytic enzymes, citric acid, acid phosphatase and lipids. [ 5 ]
Fluids are added by the seminal vesicles and the vasa deferentia turn into the ejaculatory ducts, which join the urethra inside the prostate. The prostate, as well as the bulbourethral glands, add further secretions (including pre-ejaculate), and the semen is expelled through the penis. Ejaculation has two phases: emission and ejaculation proper.
The seminal colliculus (Latin colliculus seminalis), or verumontanum, of the prostatic urethra is a landmark distal to the entrance of the ejaculatory ducts (on both sides, corresponding vas deferens and seminal vesicle feed into corresponding ejaculatory duct).
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TRUS plays a key role in assessing azoospermia caused by obstruction, and detecting distal CBAVD or anomalies related to obstruction of the ejaculatory duct, such as abnormalities within the duct itself, a median cyst of the prostate (indicating a need for cyst aspiration), or an impairment of the seminal vesicles to become enlarged or emptied. [6]
US stocks ended Friday in the red, closing out a lackluster week despite a year of historic highs. The “Magnificent Seven” group of high-performing tech stocks — Alphabet, Amazon, Apple ...